Drill and tap guide

Details Drill and tap guide Drill and tap guide

1994-02-24

1995-05-16

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

408 76, 408115B, 408241B, B23B 4900

Patent

active

054155029

ABSTRACT:
A drill and tap guide comprises a block having appreciable thickness and one or more guide holes therethrough. The guide holes are sized to suit different diameter taps and/or drills. The guide holes are perpendicular to the plane of a block first face. The first face of the drill and tap guide is placed on a flat surface of a workpiece. A drill or tap is inserted through the appropriate guide hole, which guides the drill or tap to remain perpendicular to the workpiece flat surface during a hand drilling or tapping operation. The block may have a circular or rectangular periphery. Different combinations of guide holes to suit different size drills, tap drills, and taps can be formed in the block. In all cases, the guide holes are located close to the block periphery. A magnet can be embedded in the block to aid in holding the block on ferrous workpieces.

REFERENCES:
patent: 907735 (1908-12-01), Cain, Jr.
patent: 1329970 (1920-02-01), Hauser
patent: 2661641 (1953-12-01), Wood, Jr.
patent: 3775020 (1973-11-01), Stoutenberg
patent: 3804546 (1974-04-01), Boyajian
patent: 4256420 (1981-03-01), Day
patent: 4461603 (1984-07-01), Klee et al.

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